List of Words for Letter ‘N’
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natural selection The survival and successful reproduction of the organisms that are best suited to their environment.
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nebula A
huge cloud of gas and dust in space that is the first stage of star formation.
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neutralization The process in which an acid and a base of equal strength and ion concentration are mixed, producing water and salt.
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neutron A
particle that is found in the nucleus of an atom and has no electrical charge.
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Newton’s law of universal gravitation
The planets, the stars, and the Sun all exert gravitational forces.
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Newton’s first law of motion An object at rest tends to stay at rest and an object moving in a straight line at a constant speed tends to keep moving that way.
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Newton’s second law of motion An object’s acceleration depends on the object’s mass and the amount of net force applied to it.
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Newton’s third law of motionFor every action there is an equal and opposite reaction.
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niche The
role a species plays in a food web.
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nonvascular A
division of plants that lack vascular tissue, including roots, stems, and leaves with veins.
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nuclear fission The
splitting of a nucleus into two or more pieces when struck with a slow-moving neutron.
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nuclear fusion The
merging of nuclei with small masses to form a nucleus with a larger mass.
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nucleus The largest, most visible part of a cell, which has its own membrane and is the control center of a cell’s activities.
The center of an atom, which contains most of the atom’s mass.